Ash bug is an insect of the genus Ash bug genus Hemiptera, commonly known as ash worm, is a kind of shell worm of the city's "five small pests", which mainly harms Privet, privet, ash and other plants, causing the tree to weaken, grow slowly, and even the branches die, almost becoming a destructive pest on the privet of the small leaf. It is necessary to seize the critical period for comprehensive prevention and control to reduce the harm and damage to garden plants.
[1] Period of harm
Ash bugs occur in only 1 generation in 1 year in the north, and after the hatching nymphs crawl out of the meso shell, they parasitize on the leaves near the mother, called "fixed leaves", the female parasitizes on the front of the leaf, and the male parasitizes on the reverse side of the leaf. About 15 days after deciding, after the nymphs undergo their first molting in early July, they begin to swim toward the branches and choose a suitable place to fix the "fixed rod". The peak of the fixed leaves is in mid-to-late June, the fixed bar starts in early July, and the peak time is in mid-July. Male nymphs pupate in mid-August and pupate in late August. Adults appear in early September and are in full bloom in mid-September. In early October, the male adults feathered and died after mating.
【2】Symptoms of infection
Spawning begins in early April and the egg period is about 7 days. The hatching nymphs parasitize on the leaves near the mother, and after 2 instars, they transfer the spines on the branches to be pest, and the ash ants are densely packed and live on the host branches, and the white wax cover secreted by them is extremely rich, surrounding the branches, like wrapped in white flocculents.
[3] Comprehensive prevention and control
1, strict seedling quarantine, found that there are ash bug plants should be destroyed or buried immediately; completely prune the insect branches, timely detection, early elimination, to prevent spread.
2. Protect and utilize natural enemies: such as flower-winged jumping wasps, aphid-eating wasps, ladybugs and predatory mites.
3. Seize the key period (egg hatching peak to larval bloom period) to take medicine, and spray 150 to 200 kg per bottle of water with Kilin Qifa.
